124 results about "Traffic noise" patented technology

This invention relates to the field of engineering material technical, and it is specificly related to the method for preparing a kind of modified bituminous mixture with worn tyre. It is made as follows: mill worn tyre to powder, mix the owder with base bitumen and agitate to get rubber bitumen; gap-graded aggregate, screen the aggregates and get coarse, fine aggregates; mix rubber particles with the coarse and fine aggregates, agitate, then add rubber bitumen and agitate, lastly add powdered ore and mix to get needed production. This invention blends dry and wet processes together to exert each advantage sufficiently, and attained both the aims of consumping much worn tyre and improve pavement performance. With this invention, we can greatly improve high and low temperature behavior of bitumen and its mixture, we can longer pavement life and abate environmental pollution. The pavement paved by this mixture has the behavior of lowering traffic noise. Popularization of this achievement is economic, society, environmental and engineering benefit.

A panel assembly for a traffic noise barrier wall of the type including opposing slots formed in pairs of vertically-mounted posts is described. The panel assembly includes a sheet, which may be transparent, and a frame disposed along at least a portion of the perimeter of the sheet. Side portions of the frame capture at least a portion of the side edges of the sheet and are received within the opposing slots in drop-down fashion.

The invention provides a hot in-place recycling ultrathin overlaying machine of a bituminous pavement and a construction method thereof. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement comprises an automobile chassis, an integral power device, an electric control system, a diesel tank, a receiving and transporting device, a material transfer hopper, a horizontal transporting device, a heating device, a hydraulic system, a recycling agent spraying system, a harrowing device, a distributing spiral device, a paving screed device, a cab, and an electric control operating floor, wherein the automobile chassis is a special automobile chassis. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement finishes the continuous overlay repair work of the pavement through a series of processes such as receiving the materials, feeding the materials quantitatively, transporting the materials horizontally, spraying the recycling agent, harrowing, heating, distributing and paving the materials, ironing, and grinding and the like, and has the advantage of carrying out one-time maintenance on the defects such as loose, shallow vertical and horizontal cracks, track, slight crack, bituminous aging, pavement seepage and the like of a functional layer of the pavement. By adopting the invention, the antiskid resistance of the pavement is restored, the profile of the pavement is corrected, the appearance and the evenness of the pavement are improved, the pavement strength of the pavement is increased, the traffic noise is reduced, and the service life of the pavement is prolonged.

The invention relates to a whole image sound barrier for an urban quick lane and a tunnel portal. The sound barrier is characterized by consisting of gate-type arc steel arch racks arranged in the upper space of a pavement, and a sound barrier main body framework consisting of rigid tie rods for connecting the adjacent arch racks and cross supporting rods, wherein purlines are arranged on the main body framework; and meanwhile, the purlines arranged on the main body framework are used as supports, anti-collision wall contact faces are formed symmetrically on the left and right sides along the central axis of the sound barrier till the pavement, and a sound absorber, a ventilated exhaust part, a sound absorber, a lighting part, a sound absorber and a lighting part are arranged at intervals, so that a full-closed for semi-closed whole image sound barrier structure capable of totally isolating direct sound is formed for a road. The whole image sound barrier for the urban main road can effectively reduce the traffic noise of the urban main road, effectively reduce the reverberation in a sound barrier area and ensure the safety and the comfort degree of a road user, and is a sound barrier suitable for a building dense area nearby the urban main road.

A crashworthy traffic noise barrier system for use alongside a path of traffic, the crashworthy traffic noise barrier system comprises a crashworthy longitudinal barrier extending substantially parallel to the path of traffic and a crashworthy traffic noise barrier wall supported by the longitudinal barrier. The crashworthy traffic noise barrier wall includes a plurality of upstanding posts attached to the traffic noise barrier wall, at least one panel supported between each adjacent pair of posts in the plurality of upstanding posts, and at least one longitudinal beams spaced above a top surface of the longitudinal barrier and extending across the plurality of upstanding posts for redirecting a portion of an errant vehicle away from the at least one panel. The longitudinal beams redirect energy of the errant vehicle away from the panels such that the panels and any fragments of the panels, remain attached to the traffic noise barrier wall. The panels may be transparent and may be reinforced with plastic bands, plastic threads, or a plastic net.

The invention discloses a traffic noise pollution model based on an exposed crowd / area / acoustic environment functional area. On the basis of analyzing an existing traffic noise evaluation model and method, according to the characteristics of traffic noise subjective perceptibility and pollution locality, the model is provided by comprehensively considering the influence degree difference of traffic noise on the number of exposed crowds, the area of an exposed area and various acoustic environment functional areas, the urban traffic noise pollution total amount TNPI of an existing urban area, the average traffic noise pollution index APNI of the existing urban area, the traffic noise pollution total amount TPNPI of a urban area to be built and the average traffic noise pollution index APNPI of the urban area to be built are used for adapting to the evaluation of traffic noise pollution under different needs, and classification representation is carried out on the ANPIs. The evaluation model quantizes the degree of the noise pollution, the noise pollution degree of the urban area is evaluated more visually, and the model can be used as the punishment basis of the excessive emissions of traffic noise.

The invention provides a method for predicting traffic noise of rail regions. The method comprises the following steps: dividing a test system into multiple subsystems and establishing corresponding sub-vibration equations; establishing a general vibration equation according to a coordination relation among multiple sub-vibration equations; calculating the sound source intensity of a region to be measured on the basis of the vibration equations and test parameters; drawing a corresponding noise map of the region to be measured on the basis of a noise map drawing unit and the sound source intensity, in order to predict the traffic noise of urban rail regions based on the noise map, wherein the sound source intensity is calculated on the basis of vibration responses of a coupled system (including a vehicle system, a rail system, a bridge-pile system and an environment soil system), so that the calculation results are accurate and reasonable, and are suitable for various vehicles and elevated rail structures; according to the method for predicting traffic noise of rail regions draws, the traffic noise of the region to be measured is drawn into the noise map, so that the noise management and control, the noise environment impact assessment, the public participation and the solution decision of the urban rail transit in our country become intuitive and convenient.

A traffic noise barrier system includes a longitudinal barrier and a traffic noise barrier wall. The traffic noise barrier wall is supported by the longitudinal barrier and is spaced apart from a back surface of the longitudinal barrier in a direction away from the path of traffic. Transverse beams attach the longitudinal barrier to the noise barrier wall, and a structure may be placed across the transverse beams for catching debris. Each panel in the plurality of panels may be interconnected by a cable to an adjacent panel or an upstanding post, and each post may be interconnected by a cable and / or bar. The traffic noise barrier wall is preferably positioned at a distance greater than about 18 inches from a front surface of the longitudinal barrier, and more preferably is positioned at a distance greater than about 34 inches from the front surface.

The invention relates to a plant configuration used for urban road traffic noise reduction. Configured plants comprise evergreen tree species, deciduous tree species, evergreen shrub species, deciduous shrub species and a lawn, wherein the evergreen tree species comprise Cinnamomum camphora and Ligustrum lucidum; the deciduous tree species comprise gingko, Zelkova serrate and Prunus cerasifera; the evergreen shrub species comprise sweet-scented osmanthus and oleander; the deciduous shrub species comprise Hibiscus syriacus L, Chinese redbud, flowering peach and multiflora rose; and the lawn is a Manila lawn. The evergreen tree species, the deciduous tree species, the evergreen shrub species and the deciduous shrub species used for the plant configuration are called by a nursery stock and respectively come from a nursery garden. The plant configuration used for the urban road traffic noise reduction has the advantages that the environment is beautified; the service life is long; the operability is strong; the landscape property is good; the ecological value is high; the cost is low; planting and maintenance are easy; the noise reduction effect is good; and the noise reduction function is efficient. Better noise reduction can also be performed on zones of which road green belts are not sufficient or stained in width because of the limitations of geographic locations or the ambient environments, and a very good action is performed in creating an urban favorable living environment.

The invention relates to a porous foam dual-surface sound adsorption ultra-thin sound baffle, belonging to the noise control technique. It comprises: two layers of porous plates, two layers of chambers, two groups of non-fiber sound adsorption porous material, a trapezium chamber, a folded baffle plate, and the frame. Wherein, two layers of chambers are arranged between the two layers of porous plates and two groups of non-fiber sound adsorption porous material; the trapezium chamber is arranged between two groups of non-fiber sound adsorption porous material and the folded baffle plate; the frame can fix the porous plates and the folded baffle plate; two groups of non-fiber sound adsorption porous material are fixed on the folded baffle plate; each back of said groups of non-fiber sound adsorption porous plates has a group of trapezium chamber; and two groups of trapezium chambers are meshed and filled by non-fiber sound adsorption porous material. the invention can be mounted between the upper and lower rails of railway or city road or between the driveways to reduce the traffic noise.

The system for acquiring road traffic flow information and traffic noise data synchronously, which is characterized by comprising a front-end monitoring subsystem, a data storage center server and a background monitoring terminal. The front-end monitoring subsystem comprises a traffic flow information acquiring subunit, a noise data acquiring subunit and a processing subunit; the data storage center server is used for storing the traffic flow information and the traffic noise data of the front-end monitoring subsystem synchronously, replying the data request from the background monitoring terminal and forwarding the control request of the background monitoring terminal; the background monitoring terminal is used for displaying traffic flow information and the traffic noise data monitoring by the front-end monitoring subsystem, remotely controlling the front-end monitoring subsystem and inquiring and counting the acquired data. The system has the characteristics of simple structure, easy implementation and high automation degree, can realize the real-time acquisition, storage, transmission and monitoring of the road traffic flow information and traffic noise data and provides a basis vehicle noise model to simulate and calculating the traffic noise.

The invention discloses an urban road traffic noise measurement method based on gradient descent. The urban road traffic noise measurement method based on gradient descent is characterized by comprising the following steps that firstly, original data of traffic noise of a certain urban road are collected and normalized; secondly, the data of all monitoring points of the original data of the traffic noise of the urban road are extracted to built a training sample set D; thirdly, the training sample set D is trained, and an urban road traffic noise predication model meeting the accuracy requirement is obtained; fourthly, the urban road traffic noise predication model is used for carrying out multiple times of predication, the predicated values are compared with the actually measured values and then corrected, and an actual predicating model meeting the accuracy requirement is obtained; fifthly, a predicating sample set D* is input to the actual predicating model obtained in the fourth step, and the noise values of all positions in the area covered by corresponding monitoring points are obtained; sixthly, by integrating the measured noise values of all the monitoring points and the noise values of all positions in the range covered by the monitoring points, the complete noise value data of the urban road are obtained.

The invention provides a method for updating a three-dimensional traffic noise map in conjunction with offline storage and instant calculation. The method comprises the following steps: dividing noise calculation into calculations for noise emission item related to traffic flow and noise degeneration item unrelated to the traffic flow; calculating the noise degeneration item only related to geographic elements in advance and offline storing in a database; while updating the three-dimensional traffic noise map, only calculating the changed noise emission item according to the change in urban road traffic flow state and calculating the final noise value by combining with the offline stored noise emission item, thereby reducing the calculation amount. For increasing the updating speed of the three-dimensional traffic noise map, the manner of computer cluster parallel computing is taken for accelerating the noise calculation and updating of the noise map. The distributed calculation system combined with the method has the characteristics of high load balance, high flexibility and excellent expansibility. The system matched with the optimized noise map updating algorithm can greatly reduce the calculation time and obviously increase the updating efficiency.

The invention provides a municipal road sound absorption isolation strip which comprises a support, a base, sound absorption stand columns and a cover plate. The base is arranged on the support. The base is provided with sound absorption stand columns. The cover plate is arranged on the sound absorption stand columns. Each sound absorption stand column comprises a shell and noise elimination materials. The noise elimination materials fill the shell. The shell is made of a punched plate. The noise elimination materials are glass wool or perlite or rock wool. The sound absorption stand column is a polyhedral sound absorption body. A horizontal section shape of the polyhedral sound absorption body is <-shaped or S-shaped or Z-shaped in a right angle mode or I-shaped in an oblique angle mode. The municipal road sound absorption isolation strip has the advantages that anti-dazzle effect is good, ventilation effect is good, a strong noise absorption function is achieved, and the traffic noise pollution problem is improved largely.

Disclosed is an impact resistant traffic noise barrier system. The system includes a traffic barrier that is designed to be placed adjacent a roadway and next to a flow of traffic. The design and weight of the traffic barrier permit it to withstand a variety of vehicle impacts. As part of the system, a sound wall is installed along the top of the traffic barrier. The sound wall includes a series of beams that are secured to the traffic barrier via anchor plates. Acoustic panels are secured between adjacent beams. An anchor cable extends from an anchor post, to a first post, and along a number of intermediate posts. The anchor cable is thus suspended above the traffic barrier with the anchor cable being connected to the beams. As such, the anchor cable suspends the beams in the event they become separated from the traffic barrier.

The invention relates to an urban traffic noise monitoring system of intelligent terminal monitoring. The urban traffic noise monitoring system comprises a noise monitoring device, a wireless gateway,a noise data storage server, a noise data processing server, a cloud server and a user client, wherein on a wireless noise measuring node, the noise monitoring device is used for measuring the noisedata of the node, the noise monitoring device is a noise monitor with a WiFi function integrating a frequency spectrum analyzer and a sound level meter and an intelligent terminal and is arranged on ageographic position of the wireless noise measuring node, and a specific position in a map is marked by virtue of a coordinate.

The invention discloses an integrated road traffic information acquisition system including a noise monitoring unit, a video traffic flow detection unit, a data processing and storage unit and a background management unit; the noise monitoring unit records the traffic noise data including weighted sound pressure level data, statistical sound pressure level data and spectral data, and the video traffic flow detection unit is used for acquiring the traffic flow, speed, vehicle type, time headway and other traffic data in real time. The data processing and storage unit is used for storing the traffic noise data acquired by the noise monitoring unit and the traffic flow data acquired by the video traffic flow detection unit. The background management unit is used for performing interactive operation with the data center and the monitoring terminal to localize the instructions of the monitoring terminal and the data center. The integrated road traffic information acquisition system has the characteristics of simple structure, high automation, and all-weather monitoring, can synchronously acquire the traffic noise data and traffic flow data in real time, and provides a large amount of basic data for the road traffic noise source strong emission model.

The invention relates to a carrier by which containers are delivered along an underground tunnel or an underground pipeline and the loading and unloading are completed at a delivery terminal. The carrier has the advantages of saving land, avoiding jagged roads of the containers under the meteorologic disaster conditions such as storm wind, snow rainfall and heavy fog, etc., being more reliable, on-time and safer, reducing the traffic accidents caused by urban container transport, reducing the energy loss and waste gas exhaust, reducing the traffic noise, lightening the vibration, etc. which are caused by the container transport, etc. as well as realizing the linear transport of the containers, thus shortening the transport distance of the containers.

A novel sound barrier with a resonance cantilever beam comprises an upper structure, a lower structure and a middle structure, wherein the upper structure and the lower structure are composed of combined sound absorption and insulation barrier plates, and the middle structure is composed of a fixed sound insulation frame and a transparent plate. The transparent plate and the up-down combined soundabsorption and insulation barrier plate are connected into a whole through the fixed sound insulation frame, and the transparent plate has a certain sound insulation effect besides providing a certain observation visual field for running traffic vehicles. The resonance sound absorption structure such as the resonance cantilever beam is applied to the sound barrier for the first time, the noise reduction effect of the sound barrier can be further enhanced, and the influence of traffic noise on life of people is reduced to the minimum.

The invention relates to the technical field of a sound isolation purification window, in particular to an air-breathing multifunctional window. The air-breathing multifunctional window comprises an inner side window frame body and an outer side window frame body, wherein the inner side window frame body and the outer side window frame body form a ventilation and muffling passage through a density board; the inner wall of the ventilation and muffling passage is formed by a perforated plate and keel type glass wool; an air inlet, a primary effect filtering screen, an efficient filtering screen, a negative ion generator, an air outlet and a control system are arranged in the ventilation and muffling passage; the primary effect filtering screen is arranged in the position of the air inlet; the efficient filtering screen and the negative ion generator are respectively arranged in the position of the air outlet; an air inlet sensor is embedded in the position of the air inlet; an air outlet sensor and a loudspeaker are embedded in the position of the air outlet; the air inlet sensor, the air outlet sensor and the loudspeaker are electrically connected with the control system. By using such structural arrangement, the problems of traffic noise pollution and air pollution can effectively solved; the requirements of people can be met; indoor air breathing and effective sound isolation and purification performance can be realized.

The invention discloses a water-discharging noise-lowering asphalt pavement structure of a cement concrete bridge deck. The pavement structure comprises a waterproof bonding layer, a buffer layer, a laying lower layer, a bonding layer and a laying surface layer, which are sequentially laid from bottom to top, wherein the waterproof bonding layer is laid on a cement concrete bridge deck panel; the laying surface layer is OGFC-13 upgraded asphalt mixed material, the bonding layer is a double-layer SBS modified emulsified asphalt layer, the laying lower layer is an AC-13 asphalt mixed material layer, and the buffer layer is a rubber asphalt stress absorption layer. The invention also provides a laying process of the asphalt pavement structure. Compared with an ordinary asphalt pavement, the water-discharging noise-lowering asphalt pavement structure has the advantages that the traffic noise can be reduced by 3dB to 8dB; meanwhile, rainy water can be discharged out of the pavement by virtue of a large-opening gap inside the asphalt mixed material, the water splashing and mist can be avoided, the water harm on the bridge deck can be avoided, the slipping resistance of the pavement and the driving safety of the pavement can be improved, the road property of the laying surface layer is excellent, and the durability of a bridge can be improved.

The invention relates to carbon fiber heat preservation and sound absorption cotton and a preparation method and application thereof. The cotton is prepared from, by weight, 60-95 parts of carbon fiber and 5-40 parts of polyester fiber. The carbon fiber heat preservation and sound absorption cotton can effectively lower noise, the advantages that the carbon fiber has no melting point and is not burnt are sufficiently utilized, the physical property that the polyester fiber has a melting point is sufficiently utilized, the ratio of the cotton to the polyester fiber is adjusted, the cotton and the polyester fiber are organically combined, the carbon fiber heat preservation and sound absorption cotton is manufactured through a series of physical changing processes, and the carbon fiber heat preservation and sound absorption cotton is environmentally friendly, comfortable and good in heat preservation and sound absorption effects and is of great guiding significance in follow-up traffic noise abatement work.

The invention relates to a wireless monitoring urban traffic noise inquiring system. The wireless monitoring urban traffic noise inquiring system comprises a noise monitoring device, a wireless gateway, a noise data storage server, a noise data processing server, a cloud server and a user client, wherein at a wireless noise measuring node, the noise monitoring device is used for measuring the noise data at the node, the noise monitoring device is a noise monitor with a WiFi function integrating a frequency spectrum analyzer and a sound level meter, and is arranged on a geographical position ofthe wireless noise measuring node, and a specific position of the noise monitoring device is marked in a map by virtue of a coordinate.

The invention discloses a multifunctional road guardrail. Under the premises of not influencing beauty, and not occupying extra space, the multifunctional road guardrail has the function of a road lamp, and besides, has the effects of absorbing noise and reducing noise pollution. The multifunctional road guardrail disclosed by the invention comprises a first stand column, a second stand column, an upper transverse beam and a lower transverse beam, wherein two ends of the upper transverse beam and the lower transverse beam are respectively connected with the first stand column and the second stand column; the lower end surfaces of the first stand column and the second stand column are each provided with a base; a plurality of vertical tubes are arranged between the upper transverse beam and the lower transverse beam; the top end of the first stand column is connected with a road-lamp bracket in a demountable manner; the height of the road-lamp bracket is 2-4m; the road lamp is arranged at the top end of the road-lamp bracket; a sound absorbing plate for absorbing traffic noise is arranged between every two corresponding adjacent vertical tubes in a demountable manner.

The invention provides a traffic noise dynamic simulation method by combining a cellular automaton traffic flow model. The method is suitable for dynamic simulation calculation of road traffic noise. The method comprises a traffic flow simulation module, a vehicle noise discharge calculation module and a noise propagation attenuation calculation module, wherein the traffic flow simulation module is realized through the cellular automaton traffic flow model. The method comprises the following calculating steps: carrying out dynamic simulation on road traffic flow through the traffic flow simulation module; inputting vehicle type, speed and accelerated speed obtained through traffic flow simulation into the vehicle noise discharge calculation module to carry out vehicle noise discharge calculation, and meanwhile, inputting vehicle position parameter obtained through traffic flow simulation into the noise propagation attenuation calculation module to calculate attenuation amount; and finally, obtaining a noise value of a receiving point by combining the calculation results of the vehicle noise discharge calculation module and the noise propagation attenuation calculation module. The method greatly simplifies traffic flow simulation process and has the advantages of small calculation amount and accurate and reliable simulation calculation result.

The invention provides a method and a system for voice recognition. The method includes acquiring a sound in real time, the sound including traffic noise; Converting the sound into a discrete digitalsignal and a feature quantity; Real-time optimizing a depth learning neural network model according to the discrete digital signal and the feature quantity. The sound is recognized using a depth learning neural network model. The voice recognition method and system of the present invention can accurately recognize the voice type appearing in the road and automatically improve the recognition accuracy in the recognition process.